Fix inference CLI

[ClemDoum]

Description:

• In Python 2.7, UTF-8 str input must be converted to unicode otherwise we can't type UTF-8 characters in the inference CLI

[codecov-io]

Codecov Report

Merging #762 into develop will decrease coverage by 0.03%.
The diff coverage is 60%.

@@             Coverage Diff             @@
##           develop     #762      +/-   ##
===========================================
- Coverage     88.1%   88.07%   -0.04%     
===========================================
  Files           74       74              
  Lines         4497     4502       +5     
  Branches       863      864       +1     
===========================================
+ Hits          3962     3965       +3     
- Misses         398      400       +2     
  Partials       137      137